// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
#define BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_

#include <CoreFoundation/CoreFoundation.h>

#include "base/scoped_generic.h"

namespace base {
namespace mac {

    namespace internal {

        struct ScopedCFFileDescriptorRefTraits {
            static CFFileDescriptorRef InvalidValue() { return nullptr; }
            static void Free(CFFileDescriptorRef ref)
            {
                CFFileDescriptorInvalidate(ref);
                CFRelease(ref);
            }
        };

    } // namespace internal

    // ScopedCFFileDescriptorRef is designed after ScopedCFTypeRef<>. On
    // destruction, it will invalidate the file descriptor.
    // ScopedCFFileDescriptorRef (unlike ScopedCFTypeRef<>) does not support RETAIN
    // semantics, copying, or assignment, as doing so would increase the chances
    // that a file descriptor is invalidated while still in use.
    using ScopedCFFileDescriptorRef = ScopedGeneric<CFFileDescriptorRef,
        internal::ScopedCFFileDescriptorRefTraits>;

} // namespace mac
} // namespace base

#endif // BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
